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首页> 外文期刊>Water >Risk Assessment of Upper-Middle Reaches of Luanhe River Basin in Sudden Water Pollution Incidents Based on Control Units of Water Function Areas
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Risk Assessment of Upper-Middle Reaches of Luanhe River Basin in Sudden Water Pollution Incidents Based on Control Units of Water Function Areas

机译：基于水功能区控制单元的Lu河中上游突发水污染事故风险评估

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Upper-middle reaches of Luanhe River Basin belongs to Haihe River Basin and it is a pretty important water source to North China, especially to Tianjin and Tangshan Cities, Hebei. Based on control units of the water function areas and the sub-basins the working units were produced. The index system for environmental risk source hazard was constructed by adopting the pressure state response (PSR) environmental analysis model. The environment risk sources are identified, and their hazard grade assessment is performed. In the environmental risk source hazard an assessment index system, namely “downstream characteristics of environmental risk sources” is added by taking the fact into account that environmental risk sources themselves are affected by different functional areas (working units) downstream of the rivers. Through collecting hazard data, determining their standards and weights for environment risk sources, the fuzzy comprehensive evaluation method is used to calculate the risk source hazard grades and the vulnerability grades of the working units. Using the one-dimensional exponential decay river model for pollutants in rivers, the hazard grade evaluation method of working units is established. This consists of two parts: (1) The risk source hazard grade of the working unit itself, and (2) the impact of the risk sources upstream on the working unit downstream of the rivers. Combining the hazard grade with the vulnerability grade of the working unit, the risk grade of the working unit is evaluated through the risk matrix. The risk zones of the watershed are realized by merging working units in the same control units of the water function areas with the same risk grades. The risk zoning of sudden water pollution incidents in the upper and middle reaches of Luanhe River Basin is obtained by applying the above risk zoning method. It is found that there are 55 risk zones in total, including three highest risk zones, 15 higher risk zones, 14 lower risk zones, 23 lowest risk zones. These results indicate that the upper and middle reaches of River Luanhe are overall at low risk. The corresponding management methods for the different risk zones are suggested.
机译：an河流域的中上游地区属于海河流域，对华北地区尤其是河北天津市和唐山市来说是重要的水源。根据水功能区和子流域的控制单元，生产工作单元。采用压力状态响应（PSR）环境分析模型，建立了环境风险源危害指标体系。确定环境风险源，并进行危害等级评估。在环境风险源危害中，考虑到环境风险源本身受到河流下游不同功能区域（工作单元）的影响，因此添加了一个评估指标体系，即“环境风险源的下游特征”。通过收集危害数据，确定环境风险源的标准和权重，采用模糊综合评价法计算单位的风险源危害等级和脆弱性等级。利用河流污染物的一维指数衰减河模型，建立了单位危险性等级评价方法。这包括两个部分：（1）工作单元本身的风险源危险等级，以及（2）上游风险源对河流下游工作单元的影响。将危险等级与工作单位的脆弱性等级相结合，可以通过风险矩阵评估工作单位的风险等级。流域的风险区是通过合并具有相同风险等级的水功能区的相同控制单元中的工作单元来实现的。应用上述风险区划方法，可以得到he河流域中上游突发性水污染事故的风险区划。发现共有55个风险区，包括三个最高风险区，15个较高风险区，14个较低风险区，23个最低风险区。这些结果表明Lu河中上游总体处于低风险。建议针对不同风险区域的相应管理方法。

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